SpaceAtlas Space Object Data
NASA JPL SBDB · 2005 TP45

2005 TP45

2005 TP45 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.551 AU once every 1.93 yr.

Amor Observations: 86
Orbital Period · P
1.93 yr
v(q)
31.6 km/s
v(Q)
18.1 km/s
Diameter · ≈
0.23 km
TJ
4.33
Eccentricity · e
0.2709

Orbit and dynamics

The path is an ellipse reaching 1.131 AU from the Sun at perihelion and 1.971 AU at aphelion, a radial span of 0.84 AU.

Applying Kepler's third law to a = 1.551 AU gives an orbital period of 1.93 yr, or about 706 days.

An eccentricity of 0.271 makes the orbit moderately elongated.

A steep inclination of 21.37° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 31.6 km/s at perihelion and falls to 18.1 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 20.99 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.23 km.

Observation record and orbit quality

The current orbit solution is based on 86 observations and has a weighted RMS residual of 0.4535 arcseconds.

Condition code U = 1 means the orbit is very well determined, leaving only a small uncertainty in the future ephemeris.

About these computed values

Orbital periods, perihelion and aphelion speeds, and diameter estimates on this page are computed by SpaceAtlas from the JPL SBDB orbital elements. They are derived quantities, not values copied from the source catalogue.

Orbital Parameters

Semi-Major Axis
1.551 AU
Eccentricity
0.2709
Perihelion
1.131 AU
Aphelion
1.971166 AU
Inclination
21.37°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
244.08°

Orbit diagram

The Sun sits at the focus (orange). Earth's orbit is the grey circle at 1 AU. The red dot marks the object's position at the catalog epoch.

3D orbit (interactive)

Drag to rotate; scroll or pinch to zoom. The Sun is at the focus (orange), Earth's orbit is the grey ring at 1 AU, and the red dot marks the object's current position.

Close approaches

Predicted close approaches to Earth, from NASA's Center for Near-Earth Object Studies (CNEOS).

Date (UTC)Miss distanceVelocity
2032-Oct-08 23:11 0.386754 AU
57857558 km
13.49 km/s
2034-Oct-07 20:13 0.148596 AU
22229684 km
11.68 km/s
2061-Oct-09 14:31 0.260847 AU
39022114 km
12.21 km/s
2063-Oct-06 13:01 0.245041 AU
36657593 km
12.72 km/s

Distances in astronomical units (AU) and kilometres. Source: NASA/JPL CNEOS Close Approach Data API.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
20.99

Orbit Quality

RMS
0.45353
Condition
1
Orbit ID
—
Data source: NASA JPL Small-Body Database · NASA CNEOS. Orbital periods, perihelion and aphelion speeds, and diameter estimates on this page are computed by SpaceAtlas from the JPL SBDB orbital elements. They are derived quantities, not values copied from the source catalogue.

Keep exploring

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